E-link China Technology Co., Ltd.
E-link China Technology Co.,Ltd. Professional Fiber Optical Communication and CCTV Security Transmission Product Manufacturer
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3G-SDI Fiber Converter with Loop-out RS422/485 Audio Mic Tally
Overview
The LNK-3G-1BV1T2BD2A1M Fiber Converter integrates 3G/HD-SDI video with loop-out, tally,
RS422/485 data, stereo audio, and microphone over a single fiber link. Designed for broadcast,
surveillance, and industrial monitoring, it ensures real-time, uncompressed transmission up to 20km.
With wide temperature tolerance, hot-swappable design, and LED indicators, it provides reliable
performance in demanding environments.
Features
Transmits 1Ch 3G-SDI with loop-out, 1Ch tally, RS422/485 data, audio & mic
Supports SMPTE 424M/425M standards with up to 3.2Gbps bitrate
Compatible with 720P, 1080i, and 1080P up to 60Hz formats
Transmission distance up to 20km over single mode fiber
Hot-swappable modules with uncompressed broadcast-grade video
LED indicators for quick status monitoring
Rugged aluminum case, wall-mountable, -20℃ to +70℃ industrial grade
Technical Indexes
| Fiber Optical interface | |
| Fiber interface | Simplex LC |
| Transmission distance | 0-20Km |
| Wavelength | 1310nm/1550nm |
| Video | |
| Video interface | BNC |
| Video input/output impedance | 75Ω |
| Video input/output voltage | Typical:1Vpp, Min 0.5Vpp, Max 1.5Vpp |
| Video Bits Rate | Max 3.2Gb/s |
| Differential gain (10%～90% APL) | <1% |
| SDI format support | 625/25 PAL |
| 525/29.97 NTSC, 525/23.98 NTSC | |
| 720p50, 720p59.94 | |
| 1080i 23/24/30/50/59.94 | |
| 1080P 23.98/24/30/50/60 | |
| Video SDI standard | 270Mbps (SD-SDI), 1.485Gbps/M(HD-SDI) |
| SMPTE425M3Gb/s Mapping(3G-SDI) | |
| SMPTE424M 3Gb/s serial interface(3G-SDI) | |
| Data or Tally | |
| Physical interface | Industrial standard screw terminal |
| Data type | RS485 (Default) or RS422 (Optional), Tally signal |
| Frequency/Rate support | Max. 115200bps for RS422 Max. 57600bps for RS485 |
| BER | <10ˉ9 |
| Stereo Audio or Microphone | |
| Audio input and output | 3.5MM Audio |
| Audio format | @48KHz |
| Electrical | |
| Power adaptor | DC 5~25V |
| Power consumption | <5W |
| LED Indicator | |
| P/S | Power Supply |
| DAT | Data |
| Mechanical | |
| Dimensions (LxWxH) | 120 x 105 x 28 mm |
| Weight | 1.5KG/pair |
| Casing | Aluminum Case |
| Mounting Options | Wall-mount |
| Environmental | |
| Working Temperature | -20℃～+70℃ |
| Storage Temperature | -40℃～+80℃ |
| Working Humidity | 0~95% |
| MTBF | ≥100000 hours |
Ordering Information
| Model | Description |
| LNK-3G-1BV1T2BD2A1M | 1Ch Bidirectional 3G-SDI with Loop + 1Ch Tally + 2Ch Bidirectional RS485 or RS422 + 2Ch Stereo Audio + 1Ch Microphone over Fiber Converter, Single Mode Fiber, LC, 20km, including Transmitter and Receiver, used by pairs |
Panel Picture
Note:
1. To+/To- can drive the LED with current 50MA
2. TIN/TCM for Tally Signal connection
3. T+/R- for RS485 (default) or RS422 (optional)